package com.yinge.opengl.camera.filter.advanced;

import android.opengl.GLES20;

import com.yinge.opengl.camera.R;
import com.yinge.opengl.camera.filter.base.gpuimage.GPUImageFilter;
import com.yinge.opengl.camera.util.OpenGlUtils;

import java.nio.ByteBuffer;

public class MagicSweetsFilter extends GPUImageFilter{
	private int[] mToneCurveTexture = {-1};
	private int mToneCurveTextureUniformLocation;
	private int mMaskGrey1TextureId = -1;
	private int mMaskGrey1UniformLocation;
	private int mLowPerformanceUniformLocation;
	
	public MagicSweetsFilter(){
		super(NO_FILTER_VERTEX_SHADER, OpenGlUtils.readShaderFromRawResource(R.raw.sweets));
	}
	
	public void onDestroy(){
		super.onDestroy();
	    GLES20.glDeleteTextures(2, new int[]{mToneCurveTexture[0], mMaskGrey1TextureId}, 0);
	    mToneCurveTexture[0] = -1;
	    mMaskGrey1TextureId = -1;
	}
	  
	protected void onDrawArraysAfter(){
		if (mToneCurveTexture[0] != -1){
			GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
			GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
			GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
	    }
		if (mMaskGrey1TextureId != -1){
			GLES20.glActiveTexture(GLES20.GL_TEXTURE4);
			GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
			GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
	    }
	}
	  
	protected void onDrawArraysPre(){
		if (mToneCurveTexture[0] != -1){
			GLES20.glActiveTexture(GLES20.GL_TEXTURE3);
			GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mToneCurveTexture[0]);
			GLES20.glUniform1i(mToneCurveTextureUniformLocation, 3);
	    }
		if (mMaskGrey1TextureId != -1){
			GLES20.glActiveTexture(GLES20.GL_TEXTURE4);
			GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mMaskGrey1TextureId);
			GLES20.glUniform1i(mMaskGrey1UniformLocation, 4);
	    }
	}
	  
	public void onInit(){
		super.onInit();
	    mToneCurveTextureUniformLocation = GLES20.glGetUniformLocation(mGLProgId, "curve");
        mMaskGrey1UniformLocation = GLES20.glGetUniformLocation(getProgram(), "grey1Frame");
        mLowPerformanceUniformLocation = GLES20.glGetUniformLocation(getProgram(), "lowPerformance");
        setInteger(mLowPerformanceUniformLocation, 1);
	}
	  
	public void onInitialized(){
		super.onInitialized();
	    runOnDraw(new Runnable(){
		    public void run(){
		    	GLES20.glGenTextures(1, mToneCurveTexture, 0);
			    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mToneCurveTexture[0]);
			    GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
		                GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
		        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
		                GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
		        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
		                GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
		        GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
		                GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);				
		        byte[] arrayOfByte = new byte[1024];
		        int[] arrayOfInt = { 0, 1, 2, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 10, 11, 12, 13, 14, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 23, 24, 24, 25, 26, 27, 28, 29, 30, 30, 31, 32, 33, 34, 35, 36, 37, 38, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 79, 80, 81, 82, 83, 84, 86, 87, 88, 89, 90, 92, 93, 94, 95, 96, 98, 99, 100, 101, 103, 104, 105, 106, 108, 109, 110, 111, 113, 114, 115, 116, 118, 119, 120, 121, 123, 124, 125, 126, 128, 129, 130, 132, 133, 134, 135, 137, 138, 139, 140, 142, 143, 144, 145, 147, 148, 149, 150, 152, 153, 154, 155, 157, 158, 159, 160, 161, 163, 164, 165, 166, 167, 169, 170, 171, 172, 173, 174, 176, 177, 178, 179, 180, 181, 182, 183, 184, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 214, 215, 216, 217, 217, 218, 219, 220, 221, 222, 222, 223, 224, 225, 226, 227, 227, 228, 229, 230, 230, 231, 232, 233, 234, 234, 235, 236, 237, 237, 238, 239, 240, 240, 241, 242, 243, 243, 244, 245, 246, 246, 247, 248, 248, 249, 250, 251, 251, 252, 253, 254, 254, 255 };
		        for (int i = 0; i < 256; i++){
		          arrayOfByte[(i * 4)] = ((byte)arrayOfInt[i]);
		          arrayOfByte[(1 + i * 4)] = ((byte)arrayOfInt[i]);
		          arrayOfByte[(2 + i * 4)] = ((byte)arrayOfInt[i]);
		          arrayOfByte[(3 + i * 4)] = ((byte)i);
		        }
		        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, 256, 1, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, ByteBuffer.wrap(arrayOfByte));
		        mMaskGrey1TextureId = OpenGlUtils.loadTexture( "filter/rise_mask2.jpg");
		    }
	    });
	}
}
